Ardtornish Level II plot - Uptake of heavy metals

Rate of uptake of macronutrients and heavy metals based on estimated tree growth rates
Element Rate of uptake Sample size
Macronutrients (kg ha-1 yr-1) N 0.9 10
P 0.4 10
K 0.6 10
Ca 2.0 10
Mg 0.1 10
Heavy Metals (g ha-1 yr-1) Cu 2.2 10
Zn 3.7 10
Cd 0.07 10
Pb 0.51 10
Ni 1.2 10
Cr 2.2 10

Levels of various macronutrients (mg/kg) in bark, sapwood and heartwood of a selection of dominant and co-dominant trees
Element Bark Sapwood Heartwood
Average Standard error Sample size Average Standard error Sample size Average Standard error Sample size
N 0.502 0.009 5 0.122 0.010 5 0.068 0.003 5
P 0.027 0.0005 5 0.009 0.0008 5 0.002 0 5
K 0.281 0.019 5 0.108 0.009 5 0.049 0.003 5
Mg 0.113 0.002 5 0.010 0.001 5 0.002 0.0003 5
Ca 2.862 0.190 5 0.091 0.009 5 0.061 0.007 5
S 0 0 0 0 0 0 0 0 0

Levels of various heavy metals (mg/kg) in bark, sapwood and heartwood of a selection of dominant and co-dominant trees
Element Bark Sapwood Heartwood
Average Standard error Sample size Average Standard error Sample size Average Standard error Sample size
Cu 5.58 0.300 5 3.92 0.811 5 2.46 0.302 5
Zn 41.94 7.473 5 3 0.482 5 1.86 0.344 5
Cd 0.45 0.067 5 0.108 0.027 5 0.048 0.013 5
Pb 3.32 0.426 5 0.684 0.103 5 0.426 0.080 5
Ni 0.684 0.060 5 2.473 0.661 5 1.327 0.355 5
Cr 1.213 0.226 5 4.944 1.740 5 1.938 0.339 5